2216615474531 has 16 divisors (see below), whose sum is σ = 2319328650240. Its totient is φ = 2116846959360.

The previous prime is 2216615474519. The next prime is 2216615474609. The reversal of 2216615474531 is 1354745166122.

It is a cyclic number.

It is not a de Polignac number, because 2216615474531 - 2²² = 2216611280227 is a prime.

It is a super-2 number, since 2×2216615474531² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2216615474131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3100301 + ... + 3747678.

It is an arithmetic number, because the mean of its divisors is an integer number (144958040640).

Almost surely, 2^{2216615474531} is an apocalyptic number.

2216615474531 is a deficient number, since it is larger than the sum of its proper divisors (102713175709).

2216615474531 is an equidigital number, since it uses as much as digits as its factorization.

2216615474531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6848194.

The product of its digits is 1209600, while the sum is 47.

The spelling of 2216615474531 in words is "two trillion, two hundred sixteen billion, six hundred fifteen million, four hundred seventy-four thousand, five hundred thirty-one".